communication

4 articles · All tags

• Why Do Whales Sing? Song, Mating and Communication
  Whales sing mainly to communicate. Male humpback whales produce long, structured songs in breeding grounds, probably to attract mates and signal to rival males.
• The Optical Telegraph: Semaphore Networks Before Electricity
  How 18th-century semaphore towers relayed coded messages hundreds of kilometers in minutes — the first practical telecommunications network, and its brief dominance.
• Fiber Optics and Total Internal Reflection
  How light is trapped inside hair-thin glass strands by total internal reflection — the physics that carries the internet as pulses of light.
• The Printing Press
  The movable-type printing press developed in fifteenth-century Europe, and its effects on the spread of knowledge, literacy, and communication.